21202000203 has 4 divisors (see below), whose sum is σ = 28269333608. Its totient is φ = 14134666800.

The previous prime is 21202000201. The next prime is 21202000213. The reversal of 21202000203 is 30200020212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21202000203 - 2¹ = 21202000201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202000201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533666698 + ... + 3533666703.

It is an arithmetic number, because the mean of its divisors is an integer number (7067333402).

Almost surely, 2^21202000203 is an apocalyptic number.

21202000203 is a deficient number, since it is larger than the sum of its proper divisors (7067333405).

21202000203 is an equidigital number, since it uses as much as digits as its factorization.

21202000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067333404.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21202000203 its reverse (30200020212), we get a palindrome (51402020415).

The spelling of 21202000203 in words is "twenty-one billion, two hundred two million, two hundred three", and thus it is an aban number.